java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 10:30:38,341 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 10:30:38,343 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 10:30:38,357 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 10:30:38,358 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 10:30:38,358 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 10:30:38,359 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 10:30:38,363 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 10:30:38,364 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 10:30:38,366 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 10:30:38,366 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 10:30:38,367 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 10:30:38,367 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 10:30:38,368 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 10:30:38,371 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 10:30:38,372 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 10:30:38,374 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 10:30:38,384 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 10:30:38,385 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 10:30:38,386 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 10:30:38,387 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 10:30:38,392 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 10:30:38,392 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 10:30:38,392 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 10:30:38,393 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 10:30:38,393 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 10:30:38,394 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 10:30:38,396 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 10:30:38,397 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 10:30:38,398 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 10:30:38,398 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 10:30:38,399 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 10:30:38,399 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 10:30:38,399 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 10:30:38,404 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 10:30:38,404 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 10:30:38,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 10:30:38,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 10:30:38,419 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 10:30:38,419 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 10:30:38,420 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 10:30:38,420 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 10:30:38,420 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 10:30:38,421 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 10:30:38,421 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 10:30:38,421 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 10:30:38,421 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 10:30:38,421 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 10:30:38,421 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 10:30:38,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 10:30:38,425 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 10:30:38,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 10:30:38,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 10:30:38,425 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 10:30:38,425 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 10:30:38,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 10:30:38,426 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 10:30:38,427 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 10:30:38,427 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 10:30:38,483 INFO ]: Repository-Root is: /tmp [2018-06-25 10:30:38,504 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 10:30:38,508 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 10:30:38,510 INFO ]: Initializing SmtParser... [2018-06-25 10:30:38,510 INFO ]: SmtParser initialized [2018-06-25 10:30:38,511 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-25 10:30:38,512 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 10:30:38,604 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 unknown [2018-06-25 10:30:38,841 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-25 10:30:38,845 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 10:30:38,853 INFO ]: Walking toolchain with 4 elements. [2018-06-25 10:30:38,854 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 10:30:38,854 INFO ]: Initializing ChcToBoogie... [2018-06-25 10:30:38,854 INFO ]: ChcToBoogie initialized [2018-06-25 10:30:38,857 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,927 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38 Unit [2018-06-25 10:30:38,927 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 10:30:38,928 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 10:30:38,928 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 10:30:38,928 INFO ]: Boogie Preprocessor initialized [2018-06-25 10:30:38,949 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,949 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,957 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,958 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,972 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,973 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,975 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... [2018-06-25 10:30:38,983 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 10:30:38,984 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 10:30:38,984 INFO ]: Initializing RCFGBuilder... [2018-06-25 10:30:38,984 INFO ]: RCFGBuilder initialized [2018-06-25 10:30:38,985 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 10:30:39,008 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 10:30:39,009 INFO ]: Found specification of procedure gotoProc [2018-06-25 10:30:39,009 INFO ]: Found implementation of procedure gotoProc [2018-06-25 10:30:39,009 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 10:30:39,009 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 10:30:39,009 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 10:30:39,285 INFO ]: Using library mode [2018-06-25 10:30:39,285 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:30:39 BoogieIcfgContainer [2018-06-25 10:30:39,285 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 10:30:39,286 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 10:30:39,286 INFO ]: Initializing TraceAbstraction... [2018-06-25 10:30:39,289 INFO ]: TraceAbstraction initialized [2018-06-25 10:30:39,289 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:30:38" (1/3) ... [2018-06-25 10:30:39,290 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f13a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 10:30:39, skipping insertion in model container [2018-06-25 10:30:39,290 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:30:38" (2/3) ... [2018-06-25 10:30:39,290 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f13a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 10:30:39, skipping insertion in model container [2018-06-25 10:30:39,290 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:30:39" (3/3) ... [2018-06-25 10:30:39,292 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 10:30:39,301 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 10:30:39,308 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 10:30:39,348 INFO ]: Using default assertion order modulation [2018-06-25 10:30:39,348 INFO ]: Interprodecural is true [2018-06-25 10:30:39,349 INFO ]: Hoare is false [2018-06-25 10:30:39,349 INFO ]: Compute interpolants for FPandBP [2018-06-25 10:30:39,349 INFO ]: Backedges is TWOTRACK [2018-06-25 10:30:39,349 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 10:30:39,349 INFO ]: Difference is false [2018-06-25 10:30:39,349 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 10:30:39,349 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 10:30:39,359 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 10:30:39,369 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 10:30:39,369 INFO ]: Found error trace [2018-06-25 10:30:39,370 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:30:39,370 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:30:39,374 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 10:30:39,375 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:30:39,376 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:30:39,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:39,416 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:30:39,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:39,477 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:39,576 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:39,579 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 10:30:39,579 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 10:30:39,581 INFO ]: Interpolant automaton has 3 states [2018-06-25 10:30:39,592 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 10:30:39,592 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 10:30:39,594 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 10:30:39,678 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 10:30:39,678 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 10:30:39,681 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 10:30:39,682 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 10:30:39,682 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 10:30:39,690 INFO ]: With dead ends: 9 [2018-06-25 10:30:39,690 INFO ]: Without dead ends: 9 [2018-06-25 10:30:39,692 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 10:30:39,707 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 10:30:39,733 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 10:30:39,734 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 10:30:39,735 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 10:30:39,736 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 10:30:39,736 INFO ]: Finished accepts. word is rejected. [2018-06-25 10:30:39,737 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 10:30:39,737 INFO ]: Interpolant automaton has 3 states. [2018-06-25 10:30:39,737 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 10:30:39,737 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 10:30:39,737 INFO ]: Found error trace [2018-06-25 10:30:39,737 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:30:39,737 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:30:39,737 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 10:30:39,737 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:30:39,737 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:30:39,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:39,738 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:30:39,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:39,813 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:39,986 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:39,986 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 10:30:39,986 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 10:30:40,004 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 10:30:40,078 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:40,090 INFO ]: Computing forward predicates... [2018-06-25 10:30:40,664 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-06-25 10:30:40,666 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:40,686 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 10:30:40,686 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 10:30:40,687 INFO ]: Interpolant automaton has 6 states [2018-06-25 10:30:40,687 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 10:30:40,687 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 10:30:40,687 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 10:30:40,759 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 10:30:40,759 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 10:30:40,759 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 10:30:40,759 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 10:30:40,760 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 10:30:40,760 INFO ]: With dead ends: 11 [2018-06-25 10:30:40,760 INFO ]: Without dead ends: 11 [2018-06-25 10:30:40,761 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 10:30:40,761 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 10:30:40,762 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 10:30:40,762 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 10:30:40,762 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 10:30:40,762 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 10:30:40,762 INFO ]: Finished accepts. word is rejected. [2018-06-25 10:30:40,763 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 10:30:40,763 INFO ]: Interpolant automaton has 6 states. [2018-06-25 10:30:40,763 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 10:30:40,763 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 10:30:40,763 INFO ]: Found error trace [2018-06-25 10:30:40,763 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:30:40,763 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:30:40,763 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 10:30:40,763 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:30:40,763 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:30:40,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:40,764 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:30:40,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:40,867 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:41,517 WARN ]: Spent 384.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-06-25 10:30:41,857 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 15 [2018-06-25 10:30:42,002 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-06-25 10:30:42,004 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:42,004 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 10:30:42,004 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 10:30:42,011 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 10:30:42,067 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 10:30:42,067 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:42,070 INFO ]: Computing forward predicates... [2018-06-25 10:30:43,376 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2018-06-25 10:30:43,378 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:43,399 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 10:30:43,399 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 10:30:43,400 INFO ]: Interpolant automaton has 10 states [2018-06-25 10:30:43,400 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 10:30:43,400 INFO ]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-25 10:30:43,400 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 10:30:43,487 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 10:30:43,487 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 10:30:43,487 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 10:30:43,487 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 10:30:43,487 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 10:30:43,488 INFO ]: With dead ends: 13 [2018-06-25 10:30:43,488 INFO ]: Without dead ends: 13 [2018-06-25 10:30:43,488 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-25 10:30:43,488 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 10:30:43,490 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 10:30:43,490 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 10:30:43,490 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 10:30:43,490 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 10:30:43,491 INFO ]: Finished accepts. word is rejected. [2018-06-25 10:30:43,491 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 10:30:43,491 INFO ]: Interpolant automaton has 10 states. [2018-06-25 10:30:43,491 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 10:30:43,491 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 10:30:43,491 INFO ]: Found error trace [2018-06-25 10:30:43,491 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:30:43,491 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:30:43,491 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 10:30:43,491 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:30:43,491 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:30:43,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:43,492 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 10:30:43,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:30:43,592 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:44,290 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2018-06-25 10:30:44,547 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2018-06-25 10:30:45,613 WARN ]: Spent 978.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2018-06-25 10:30:45,954 WARN ]: Spent 327.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-06-25 10:30:46,045 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:30:46,045 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 10:30:46,045 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 10:30:46,062 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 10:30:46,120 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 10:30:46,120 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:30:46,126 INFO ]: Computing forward predicates... [2018-06-25 10:30:46,531 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:46,676 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:46,825 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:46,887 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:46,934 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,027 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,094 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,153 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,206 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,246 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,287 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,360 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,412 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,486 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,531 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:47,591 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:48,046 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2018-06-25 10:30:49,436 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:49,454 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,490 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,492 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:49,569 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,571 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:49,659 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:49,680 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,703 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:49,726 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,786 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:49,867 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:50,014 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:50,082 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:50,101 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:50,104 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:55,837 WARN ]: Spent 1.34 s on a formula simplification. DAG size of input: 221 DAG size of output: 33 [2018-06-25 10:30:56,389 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:56,391 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:56,400 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 10:30:56,403 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:30:57,677 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 31 [2018-06-25 10:30:58,022 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:01,268 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:03,783 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:06,185 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:08,344 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:10,996 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:12,810 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:15,600 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:18,190 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:18,704 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:19,166 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:19,742 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:20,208 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:20,675 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:21,110 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:21,638 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:22,098 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:24,856 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:28,493 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:31,058 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:33,998 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:37,596 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:39,739 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:42,027 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 10:31:45,911 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:46,315 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:46,868 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:47,420 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 10:31:47,987 WARN ]: expecting exponential blowup for input size 8 Received shutdown request... [2018-06-25 10:31:48,126 INFO ]: Timeout while computing interpolants [2018-06-25 10:31:48,326 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 10:31:48,327 WARN ]: Verification canceled [2018-06-25 10:31:48,330 WARN ]: Timeout [2018-06-25 10:31:48,330 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 10:31:48 BoogieIcfgContainer [2018-06-25 10:31:48,330 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 10:31:48,331 INFO ]: Toolchain (without parser) took 69485.22 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.1 MB in the beginning and 375.0 MB in the end (delta: -115.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 10:31:48,332 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 10:31:48,332 INFO ]: ChcToBoogie took 74.20 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 10:31:48,333 INFO ]: Boogie Preprocessor took 55.01 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 255.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-25 10:31:48,333 INFO ]: RCFGBuilder took 301.73 ms. Allocated memory is still 305.7 MB. Free memory was 254.0 MB in the beginning and 242.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-25 10:31:48,334 INFO ]: TraceAbstraction took 69044.42 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.0 MB in the beginning and 375.0 MB in the end (delta: -133.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 10:31:48,337 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.20 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 55.01 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 255.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 301.73 ms. Allocated memory is still 305.7 MB. Free memory was 254.0 MB in the beginning and 242.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69044.42 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.0 MB in the beginning and 375.0 MB in the end (delta: -133.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 2400 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 68.9s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 44 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1696 SizeOfPredicates, 4 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_10-31-48-347.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_10-31-48-347.csv Completed graceful shutdown